When historians refer to "The Black Death," they mean the specific outbreak of plague that took place in Europe in the mid-14th century. It was not the first time plague had come to Europe, nor would it be the last. A deadly epidemic known as the
Sixth-Century Plague
or Justinian's plague struck Constantinople and parts of southern Europe 800 years earlier, but it did not spread as far as the Black Death, nor did it take nearly as many lives.

The Black Death came to Europe in October of 1347, spread swiftly through most of Europe by the end of 1349 and on to Scandinavia and Russia in the 1350s. It returned several times throughout the rest of the century.

The Black Death was also known as The Black Plague, the Great Mortality, and the Pestilence.

THE DISEASE

Traditionally, the disease that most scholars believe struck Europe was "Plague." Best known as
bubonic plague
for the "buboes" (lumps) that formed on the victims' bodies, Plague also took
pneumonic
and
septicemic
forms. Other diseases have been postulated by scientists, and some scholars believe that there was a pandemic of several diseases, but currently the theory of Plague (
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) still holds among most historians.​

Bipolar disorder is a mood disorder that is also known as manic-depressive disorder. This illness is a mood disorder which carries a psychiatric diagnosis. A person who is bipolar may experience deep depression with breaks of mania as a complete mood shift.

There are considered to be five classifications of bipolar disorder. Bipolar 1 disorder is when a person experiences defined manic episodes. Bipolar 2 disorder is when a lesser mania, called hypomania, is paired with depressed episodes. Cyclothymia is when a person does not experience severe depressed or manic episodes but still cycle through moods. Rapid cycling is when a bipolar individual experiences at least four episodes through a year. This may be through a day to day difference with ultra-ultra rapid cycling. Normally, bipolar individuals may only shift from depressed to manic once a year. Lastly, bipolar NOS disorder is when a person does not fit in any specific category but still experience impairment from their bipolar symptoms.

The symptoms for bipolar disorder can vary widely from person to person. It is important to understand that this disorder is marked by both depression and mania- without one of these two conditions, the diagnosis may be for a different mood disorder.

Here are 10 common symptoms for bipolar disorder, categorized by their depressed or manic instances.

1. Depression: Suicidal Thoughts

One of the most serious symptoms of bipolar disorder is the possibility for suicidal thoughts. In the depression phase, the sufferer may feel so down on themselves that they contemplate suicide. Even when diagnosed and placed on medication, suicidal thoughts may continue. They can be an unfortunate side effect of the medication. If you are feeling suicidal or you are worrying about a person you know who may be suicidal, contact your local mental health hotline and seek treatment.